Dataset object should have configuration_ids list matching property_ids

[ipcamit]

Currently if I fetch a dataset object like dso = client.get_dataset(ds)["dataset"] then returned dataset object has two lists property_ids and configuration_set_ids. This create a potential mismatch where Configurations might not match property_ids. Hence it would be useful if dataset object also has a flattened configuration_ids object with bijective ordering to property_ids.